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mr-manuel avatar image
mr-manuel asked

RCD tripping when connecting to grid after firmware update

Hello,

after I updated the firmware of my MultiPlus II 48/5000/70-50 from 497 to 508 every time I try to connect the grid the RCD trips. If I put the MultiPlus in "Charge only" then it works without problems.

I live in Italy and have this constellation:

Grid -> RCD 30mA (which trips) -> MutliPlus II -> RCD 30mA -> Mains.

When I bypass the MultiPlus II by cabeling all works also fine. Before the firmware upgrade everything also worked fine. I checked everything on cabeling, but it makes no sense to me, since nothing changed and it is working when I put the MultiPlus in "Charge only".

To me it seems, that the grid relay is not disconnecting before connecting the grid, but I don't know why.

1711656877003.png

1711656890092.png


Is there a way to downgrade the firmware to 497 again? Unfortunately I was not able to find the firmware on professionals.victronenergy.com, a direct link would be great in case I missed it.

rcd trippinggrid relay
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1711656890092.png (45.1 KiB)
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3 Answers
nickdb avatar image
nickdb answered ·

I think you need to return it for bench testing. If you have followed the advice here for error 11 and the firmware is current, which it seems to be:

https://www.victronenergy.com/live/ve.bus:ve.bus_error_codes#:~:text=Error%2011%20indicates%20a%20failed,failure%20(eg%20inoperable%20relays).

Then, most likely, one of the dual input relays has failed.

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Alex Pescaru avatar image
Alex Pescaru answered ·
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mr-manuel avatar image
mr-manuel answered ·

Ok, now I downgraded the firmware, but the error persists.

I now replaced the RCD with a normal braker and now I get this error:

1711737092862.png


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